Journal of Histochemistry and Cytochemistry, Vol. 48, 471-480, April 2000, Copyright © 2000, The Histochemical Society, Inc.
New Frontiers in Gold Labeling
James F. Hainfelda and
Richard D. Powellb
a Biology Department, Brookhaven National Laboratory, Upton, New York
b Nanoprobes, Inc., Stony Brook, New York
Correspondence to:
James F. Hainfeld, Biology Department, Brookhaven National Laboratory, Upton, NY 11973. E-mail: hainfeld@bnl.gov
Recent advances in gold technology have led to probes with improved properties and performance for cell biologists: higher labeling density, better sensitivity, and greater penetration into tissues. Gold clusters, such as the 1.4-nm Nanogold, are gold compounds that can be covalently linked to Fab' antibody fragments, making small and stable probes. Silver enhancement then makes these small gold particles easily visible by EM, LM, and directly by eye. Another advance is the combination of fluorescent and gold probes for correlative microscopy. Chemical crosslinking of gold particles to many biologically active molecules has made possible many novel probes, such as goldlipids, goldNiNTA, and goldATP. (J Histochem Cytochem 48: 471480, 2000)
Key Words:
gold, immunogold, electron microscopy, gold labeling, gold clusters, immunocytochemistry, colloidal gold, Nanogold

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